Sealed · 10 L net
Loads net volume. Check geometry, driver displacement and bracing. The manual limits power handling for some alignments; check manufacturer notes.
Ground Zero / SUBWOOFER
Ground Zero GZHW 25-D1 — specifications and enclosures
Ground Zero GZHW 25-D1: T/S parameters, mounting dimensions and manufacturer enclosure recommendations. Read the original PDF and load the driver into the 3D designer.
Parameters use the linked manufacturer manual revision. One-way linear Xmax is not unambiguously confirmed; total excursion is not used as a simulation limit. Complete missing fields before full simulation. Re uses series-connected coils.
Manufacturer enclosure recommendations
Sealed · 27 L net
Loads net volume. Check geometry, driver displacement and bracing. The manual limits power handling for some alignments; check manufacturer notes.
Bass-reflex · 33 L net
Manufacturer port: shape: round, diameter: 100 mm, length: 300 mm.
Published volume and port design do not unambiguously specify Fb. F3 is not tuning frequency. Reference profile; see PDF for port details. The manual limits power handling for some alignments; check manufacturer notes. Port dimensions are reference data, not a ready cutting plan.
Documentation only — check the limitations before use.
PDF · page 6Calculator parameters
| Fs | 40.3 Hz |
|---|---|
| Vas | 9.91 L |
| Qes | 0.55 |
| Qms | 8.154 |
| Re | 1.92 Ω |
| Sd | Not provided / unverified |
| Le | Not provided / unverified |
| One-way linear Xmax | Not provided / unverified |
| Frame diameter | 27.4 cm |
| Mounting cutout | 23.8 cm |
| Mounting depth | 17.8 cm |
Additional manufacturer specifications
| RMS power (manufacturer) | 1200 W |
|---|---|
| Published Qts | 0.515 |
| Source revision | GZHW-25-D1-D2_OM_AWV4.0.pdf |
| Published excursion (not verified one-way linear Xmax) | Xmax (p2p) 45 mm / 1.77” 45 mm / 1.77” |
| Moving mass Mms | 307.2 g |
| Force factor BL | 16.48 Tm |
| Nominal impedance | 2 × 1 Ω |
Data is for one subwoofer. Manufacturer recommendations are separate from CarBoxLab calculations. Net air volume excludes the driver, port and bracing; design dimensions are external. Loading a recommendation transfers the verified volume and tuning; confirm port geometry and construction separately.
Source documentation
Original manufacturer documents are not translated. Data reviewed: 2026-10-31.